Browsing by Author "Y.S. Rammah"

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    Elastic moduli, photon, neutron, and proton shielding parameters of tellurite bismo-vanadate (TeO2–V2O5–Bi2O3) semiconductor glasses
    (ELSEVIER, 2020) Y.S. Rammah; OLARINOYE, OYELEKE; F.I. El-Agawany; A. El-Adawya; A. Gamala,; El Sayed Yousef
    In this research, elastic moduli, photon, neutron, proton, and alpha particle shielding parameters for tellurite bismo-vanadate (TeO2–V2O5–Bi2O3) were estimated and theoretically presented. Makishima–Mackenzie's (M-M) model and Phy-X/PSD software were used to achieve the required calculations. Young's modulus varied from 72.68 to 59.41 GPa while shear modulus varied from 28.75 to 23.66 GPa. Bulk modulus changed from 51.34 to 40.51 GPa, while Poisson's ratio changed from 0.264 to 0.255. The trend of the projected range for alpha and proton particles follows the order: (TVB00)Range > (TVB05)Range > (TVB10)Range > (TVB15)Range > (TVB20)Range > (TVB25)Range. The mass attenuation coefficient of the TVB glasses follows the order: (TVB00)μm<(TVB05)μm < (TVB10) μm < (TVB15) μm < (TVB20) μm < (TVB25) μm at all energies. The MFP follows a similar trend as HVT, where TVB00 glass has the highest MFP and HVT among the considered glasses. The lowest range of Zeff was achieved TVB00 glass and the highest for TVB25 glass. The f-factor of the TVB-glasses were almost equal due to similar number of electrons per unit mass. The variations in buildup factors with photon energy were identical for all glass materials and penetration depth (mfp). Results revealed that the inclusion and increase of Bi in the TVB-glass systems improves its radiation shielding capacity.
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    Investigations on borate glasses within SBC-Bx system for gamma-ray shielding applications
    (2021) Y.S. Rammah; H.O. Tekin; C. Sriwunkum; OLARINOYE, OYELEKE; Amani Alalawi; M.S. Al-Buriahi; T. Nutaro; Baris T. Tongu
    This paper examines gamma-ray shielding properties of SBC-Bx glass system with the chemical composition of 40SiO2e10B2O3exBaOe(45-x)CaOe yZnOe zMgO (where x ¼ 0,10, 20, 30, and 35 mol% and y¼z¼6mol%).Massattenuation coefficient (m=r) which is an essential parameter to study gamma ray shielding properties was obtained in the photon energy range of 0.015e15 MeV using PHITS Monte Carlo code for the proposed glasses. The obtained results were compared with those calculated by WinXCOM program. Both the values of PHITS code and WinXCOM program were observed in very good agreement. The m=r values were then used to derive mean free path (MFP), electron density (Neff), effective atomic number (Zeff), and half value layer (HVL) for all the glasses involved. Additionally, G-P method was employed to estimate exposure buildup factor (EBF) for each glass in the energy range of 0.015e15 MeV up to penetration depths of 40 mfp. The results reveal that gamma-ray shielding effec tiveness of the SBC-Bx glasses evolves with increasing BaO content in the glass sample. Such that SBC B35 glass has superior shielding capacity against gamma-rays among the studied glasses. Gamma-ray shielding properties of SBC-B35 glass were compared with different conventional shielding materials, commercial glasses, and newly developed HMO glasse. Therefore, the investigated glasses have potential uses in gamma shielding applications.